Decide whether or not each table or graph below could represent a function. If not, circle what tells you it’s not a function.
In a function, there’s exactly one y-value for each x-value. Any table or graph with more than one y-value for the same x-value, can’t represent a function.

x y

-2

5

0

2

2

4

4

7

6

8

diagonal line sloping upward

x y

0

7

1

2

1

3

2

6

3

-8

Function or Not?

Function or Not?

Function or Not?

graph of a curve that comes in to the origin from the top right and exits as a line toward the bottom right

x y

-1.5

-2

-1

-1

-0.5

0

0

1

0.5

2

scatter plot

Function or Not?

Function or Not?

Function or Not?

x y

-1

1.5

0

1.5

1

1.5

2

1.5

3

1.5

graph of an S-shaped curve, opening up and down

x y

8

1

5

2

4

3

5

4

8

5

Function or Not?

Function or Not?

Function or Not?

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